package com.yixueyun.media.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.yixueyun.media.model.po.MediaProcess;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;

import java.util.List;

/**
 * <p>
 *  Mapper 接口
 * </p>
 *
 * @author kuty
 */
public interface MediaProcessMapper extends BaseMapper<MediaProcess> {

    //查询任务
    @Select("select * from media_process t where " +
            "t.id % #{shardTotal} = #{shardIndex} " +
            "and (t.status = '1' or t.status = '3') " +
            "and t.fail_count < 3 limit #{count}")
    List<MediaProcess> selectListByShardIndex(@Param("shardTotal") int shardTotal,
                                              @Param("shardIndex") int shardIndex,
                                              @Param("count") int count);
    //开启任务，分布式锁
    @Update("update media_process m set m.status = '4' where (m.status = '1' or m.status = '3') and m.fail_count < 3 and m.id = #{id}")
    int startTask(@Param("id") long id );
}
